Improved machine foe making patch-bolts



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JOSEPH KAYLO R, OF RESERVE TOWNSHIP, VPENNSYV'LVANIA Letters Patent No. 69,816, dated October 15, 1867.

IMPROVED lMAGHINE FOR MAKING PATCH-BOLTSt To ALL wHoM 1T MAY ooNoERN;

, `Be it known thatrI, JOSEPH KAYLOR, of Reserve township, in the county ot' Allegheny,'and State of Pennsylvania, have invented a new and useful Improvement in Machine for Making Patch-Bolts; and I do hereby declare the 'following to be a full, clear, and exact description thereof, reference being had to the accompanying drawings, making a part oi this 'specilication, in which- Figure 1 is a top view of 'my improved'machin'e.. Figure 2 is a side View of the dies as they appear from a vertical plane passing through tlie line z z, fig. 1. Figure 3 is a vertical section formed by a plane passing through the swage or upsetting tool in the line y y, fig.. 1.

Eigure 4 is a side view of one ofthe cams I employ, and

Figure 5 shows in perspective a patch-bolt which my machine-is designed to make.

Like letters of reference designate likeparts. I

Such bolts usually consist of a head, x, of sq'uareor other polygonal cross-section, and slightly tapering toward the top, with a. projecting shoulder, a', bevelled on its under face, and terminating in a shank, a1. The bevelled face of the shoulder m vusually rests in a countersink in the plate tube fasteneiparticularly when the bolt is used where its head is subject to the action of fire, as in the lire-box of a locomotive. In such places an ordinary bolt-head would soon be `burned off, or be so injured by the action of the lire as to break oi under a moderate strain. The patehbolt is used by riveting the lower end of the shank x, or, in places where it cannot be conveniently riveted, it: isv chased, and nsedas a. screw-bolt. In either case the bevel surface of the shoulder m resting in'the countersink, gives it great eiiiciency inmaki'ng a tight joint. The nature of my invention consists in' the construction of a machine for making su'ch bolts, that work having been heretofore done, I believe, entirely by hand. v

To enable others skilled inthe art to make and use my invention, I will proceed to describe its construction and mode of operation. A

a is vn-substuntial framework, to support the bed-plate b, and the machinery hereinafter to be described. Near one end of the machine are the dies c c', both movable, or, as shown in the drawings, one,'c, stationary, and the other, c', movable. The,inner faces of the dies c c are made with a cylindrical cavity,a,running in the direction of the swaging or upsetting movement yet to be described, and of the diameter of the rod from` whclrthe bolt is to be made. The dies c c', at the inner end of the cavity 8, have a conical cavity or countersink, e', of the shape required to form the bevelled shoulderkrr of the bclt. Resting on the bed-plate 6, and operating in slides d d', are sliding-'bars e and f, one of which, f, is bevelled at the end next the movable die c', so that its bevelled face operatesfas a wedge against a friction-roller, o, in the rear end of such die, to move it towards the stationary die e, and thus grip the rod. The other sliding-bar, e, carris a swage or upsetting tool, g, which is made with a. socket, 2', of the shape of the head :c .of the patch-bolt shown in g. 5, the axis of 4the socket i and the direction oi' its motion being in a line with the axis of the cavity e. The sliding-bars e f are at their other or rear ends bifurcated, to rece-ive friction-rollers o o', against which play the cams lli, which in turn 'are carried on and operated by the cam-shaft m, and to this the requisite motion -is communicated in any ofthe ordinary ways. The cams Z l are of the ordinary construction, but `so shaped as to secure the movements y'et to be described. v

The bar to be formed into patch-bolts is introduced through a notch or aperture, n, in the frame a, and along the cavity s, until it strikes the base of the socket which latter, when drawn back, as shown in fig. 1, should be at such `distance from the dies c o' that a suiiicient amount of metal may pass through between the dies e c to form the head :e and shoulder x. As soon as the rod or blank lhas reachedthisL position, the cam l forces the wedge-ended sliding-bar f forward, so as to make ythe dies ce grip the rod securely. At thesame time `the knife v,-attached to the movable die c', severe the bolt or blank from the rod. The swaging-bar e is then driven forward bythe cam Z, andthe base of the'sooket z' being forced against the end of the blank staves it up or upsets it, lso as to form the head of the bolt in the socket z', and the bevelled shoulder as between the end of the swage g and the bottom of the countersink' s. A part of the face of the cam l', iig. 4, is the arc ot" a circle, so that it is enabled to hold the die a', and through it the manufactured bolt, in position, ltill the swaging-bar c is withdrawn, which is etected by a spring, c, or other equivalent means. As soon :is this is done the cam l releases the barf, when it is carried back by the springf', the die c' by the spring c, and the bolt, being released from the dies by the hook-shaped strippers r r attached thereto, is discharged from the machine complete, and falls through an aperture, n', iu the bed-plate b.

In practical use the bead a: is an important part ot' the bolt, and is made of polygonal shape, in order to be operated by a Wrench when used as a screw-bolt. It should also contain sucient metal to form a. full-sized rivet-head, after being screwed or riveted in position. The socket should of course correspond to the shape desired in the head I.

The extensive use to which patch-bolts are applied, particularly in building locomotive and other engines, and the very considerable cost of forging them by hand, render my invention of great value, aside from its simplicity, eheapness, and practical eilicicncy as a machine. By its usc patch-bolts can be manufactured cheaply, rapidly, and in abundant quantity, and in quality possessing the same elements ot' superiority which, os is well known, belong to other similar articles now manufactured by being pressed from hot iron. Such bolts thus made arc also more uniform in size and shape, and consequently are better fitted for general manufacturing purposes.

What I claim as my invention, and desire to secure by Letters Patent, is-

In a machine for making patch-bolts. thc arrangement and use of a. pair of recessed dies, which, when brought together, form a cylindrical cavity for the shank and a conical cavity for the shoulder of the bolt, in combination with a swag@ or upsetting tool, having a cavity of polygonal cross-scction for shaping the head, and at the same time upsetting the shoulder of the bolt in the conical cavity of the dies, constructed and arranged substantially in the manner and for the purposes hcreinbefore set forth.

In testimony whereof I, the said JOSEPH KAYLOR, have hereunto set my hand.

JOSEPH KAYLOR.

Witnesses:

A. S. Nicnotsoa', Guoncu Il. Cnms'rr. 

